Ikki Yakou

Five years after the Tokugawa shogunate collapsed. Kizou is the dour, misanthropic owner of a used-goods store. One night, out of the blue, the demon Koharu wanders into his house, having gotten separated from his group of wandering spirits. Koharu impudently assumes he can stay there for free, and Kizou unwillingly relents. The two of them wind up getting involved in the affairs of various spirits... A story of empathy among spirits during the Meiji era that will move you with kindness.

(Source: Square Enix, translated)